Stabilizing High Metal Loadings of Thermally Stable Platinum Single Atoms on an Industrial Catalyst Support - Details

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Abstract：

Single-atom　catalysts　have　attracted　attention　because　of　improved　atom　efficiency,　higher　reactivity,　and　better　selectivity.　A　major　challenge　is　to　achieve　high　surface　concentrations　while　preventing　these　atoms　from　agglomeration　at　elevated　temperatures.　Here　we　investigate　the　formation　of　Pt　single　atoms　on　an　industrial　catalyst　support.　Using　a　combination　of　surface　sensitive　techniques　such　as　XPS　and　LEIS,　X-ray　absorption　spectroscopy,　electron　microscopy,　as　well　as　density　functional　theory,　we　demonstrate　that　cerium　oxide　can　support　Pt　single　atoms　at　high　metal　loading　(3　wt　%　Pt),　without　forming　any　clusters　or　3D　aggregates　when　heated　in　air　at　800　°C.　The　mechanism　of　trapping　involves　a　reaction　of　the　mobile　PtO　2　with　under-coordinated　cerium　cations　present　at　CeO　2　(111)　step　edges,　allowing　Pt　to　achieve　a　stable　square　planar　configuration.　The　strong　interaction　of　mobile　single-atom　species　with　the　support,　present　during　catalyst　sintering　and　regeneration,　helps　explain　the　sinter　resistance　of　ceria-supported　metal　catalysts.　©　2019　American　Chemical　Society.

Keyword：

atom trapping; catalyst preparation; ionic Pt; single-atom catalysis; thermal stability

Community：

[ 1 ] [Kunwar, D.]Department of Chemical and Biological Engineering, Center for Microengineered Materials, University of New Mexico, Albuquerque, NM 87131, United States
[ 2 ] [Zhou, S.]Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM 87131, United States
[ 3 ] [Zhou, S.]Department of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, 333403, China
[ 4 ] [Delariva, A.]Department of Chemical and Biological Engineering, Center for Microengineered Materials, University of New Mexico, Albuquerque, NM 87131, United States
[ 5 ] [Peterson, E.J.]Department of Chemical and Biological Engineering, Center for Microengineered Materials, University of New Mexico, Albuquerque, NM 87131, United States
[ 6 ] [Xiong, H.]Department of Chemical and Biological Engineering, Center for Microengineered Materials, University of New Mexico, Albuquerque, NM 87131, United States
[ 7 ] [Pereira-Hernández, X.I.]Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99164, United States
[ 8 ] [Purdy, S.C.]Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States
[ 9 ] [Ter Veen, R.]Tascon GmbH, Mendelstr. 17, Münster, 48149, Germany
[ 10 ] [Brongersma, H.H.]Tascon GmbH, Mendelstr. 17, Münster, 48149, Germany
[ 11 ] [Brongersma, H.H.]ION-TOF GmbH, Heisenbergstr. 15, Münster, 48149, Germany
[ 12 ] [Miller, J.T.]Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States
[ 13 ] [Hashiguchi, H.]JEOL LTD, 3-1-2 Musashino, Akishima, Tokyo, 196-8558, Japan
[ 14 ] [Kovarik, L.]Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA 99354, United States
[ 15 ] [Lin, S.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, China
[ 16 ] [Guo, H.]Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM 87131, United States
[ 17 ] [Wang, Y.]Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99164, United States
[ 18 ] [Wang, Y.]Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA 99354, United States
[ 19 ] [Datye, A.K.]Department of Chemical and Biological Engineering, Center for Microengineered Materials, University of New Mexico, Albuquerque, NM 87131, United States

Reprint 's Address：

[Lin, S.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou UniversityChina

Email：

slin@fzu.edu.cn

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Source ：

ACS Catalysis

ISSN： 2155-5435

Year： 2019

Issue： 5

Volume： 9

Page： 3978-3990

1 2 . 3 5

JCR@2019

1 1 . 7 0 0

JCR@2023

ESI HC Threshold：184

JCR Journal Grade：1

CAS Journal Grade：2

Cited Count：

WoS CC Cited Count：

SCOPUS Cited Count： 239

ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 0

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